老客户对店铺的作用是()
A.提升回头率
B.提升DSR动态评分
C.提升客单价
D.提升店铺口碑
参考答案:A, B, C, D
如图所示,向锥形瓶中加入饱和食盐水润湿铁丝,塞紧带导管的单孔塞,导管的另一端伸入红色的水中两三天后,观察到导管内红色液体的液面会( )
A.升高
B.降低
C.不变
D.不能确定
The rich only ______themselves in making money and had no eye for the needs of workers.
A.devoted
B.occupied
C.enjoyed
D.concerned